CN101148275B - PVC centrifugal mother liquor treatment reclaiming technique and device - Google Patents
PVC centrifugal mother liquor treatment reclaiming technique and device Download PDFInfo
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- CN101148275B CN101148275B CN2007101195948A CN200710119594A CN101148275B CN 101148275 B CN101148275 B CN 101148275B CN 2007101195948 A CN2007101195948 A CN 2007101195948A CN 200710119594 A CN200710119594 A CN 200710119594A CN 101148275 B CN101148275 B CN 101148275B
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Abstract
The present invention is technological process and apparatus for treating and reusing centrifuged PVC mother liquid. The technological process includes the following steps: 1. cooling centrifuged PVC mother liquid in a cooler; 2. mixing the mother liquid with special treating chemical in a mixer; 3. coagulating and clarifying the mother liquid with treating chemical in a coagulating and clarifying device to obtain the first clear liquid; 4. air floating separating the first clear liquid in an air floating device to obtain the second clear liquid; 5. filtering the second clear liquid in a filter to obtain filtered clear liquid; 6. membrane treating the filtered clear liquid in a membrane treating device to obtain fresh water; and 7. desalting the fresh water in a deep desalting device to obtain pure water returned to the polymerization process. The present invention has high effect of eliminating PVC colloid and miniature suspended matter.
Description
Technical field
The present invention relates to a kind of wastewater treatment and renovation method and apparatus, particularly a kind of PVC centrifugal mother liquor treatment reclaiming technique and equipment.
Technical background
Adopt water phase suspension to produce the Polyvinyl Chloride System of polyvinyl chloride, discharge a large amount of PVC centrifugal mother liquor waste waters in the polymerization process.Contain the PVC particulate of some and the auxiliary agent in the PVC polymerization process in this waste water, handle direct discharging a little, perhaps be delivered to Sewage Plant integrated treatment discharging in most chlor-alkali enterprise.This part water is to propose pulp centrifuged machine discharge at gas after desalted water enters the polymeric kettle polymerisation, thereby the hardness of its waste water, chlorion and other content of material are all lower, and directly discharging is very unfortunate.Production of PVC technology and advanced wastewater processing technology in conjunction with at present domestic and international chlor-alkali industry, the polyvinylchloride centrifugal mother liquor waste water removes after outstanding, air supporting puies forward PROCESS FOR TREATMENT such as slurry, filtration by the dosing coagulation clarification, water quality not only reaches the requirement of environmental emission fully, and removing typical process flow processing back continued access membrane technology and the deep desalting technical matters of hanging, carrying slurry, filter, make Purified Water, as polymeric kettle polymerization water, polyvinyl chloride centrifugation mother liquid waste water is recycled again.
Summary of the invention
The purpose of this invention is to provide a kind of can the processing, to obtain being back to the PVC centrifuge mother liquor treatment process of the different operations of Production of PVC producer to the polyvinylchloride centrifugal mother liquor waste water.
Another object of the present invention provides a kind of equipment of realizing the PVC centrifugal mother liquor treatment reclaiming of above-mentioned technology.
For reaching above-mentioned first goal of the invention, the invention provides a kind of can the processing to obtain being back to the PVC centrifuge mother liquor treatment process of the different operations of Production of PVC producer to polyvinyl chloride centrifugation mother liquid waste water.This technology may further comprise the steps: when the PVC centrifuge mother liquor water temperature that discharge as if the Production of PVC device (1) is higher than 35 ℃, at first described PVC centrifuge mother liquor is transported to a heat sink and lower the temperature, obtain the PVC centrifuge mother liquor of 20-35 ℃ of water temperature; (2) the PVC centrifuge mother liquor after the described cooling is transported to a mixing arrangement and fully mixed, obtain being added with the PVC centrifuge mother liquor of PVC centrifuge mother liquor dedicated processes medicament (flocculant) with the PVC centrifuge mother liquor dedicated processes medicament (flocculant) of adding; (3) the PVC centrifuge mother liquor of the above-mentioned PVC of being added with centrifuge mother liquor dedicated processes medicament (flocculant) being transported to the coagulation clarification device carries out coagulation clarification and obtains clear liquid one time; (4) an above-mentioned clear liquid is transported to a dissolved air flotation device and carry out the air supporting flotation, propose PVA impurity, obtain the secondary clear liquid; (5) above-mentioned secondary clear liquid is transported to a filter and filter, obtained cleaner liquid; (6) above-mentioned cleaner liquid is excessively transported to a membrane treatment appts and carry out the film processing, the fresh water that obtains after handling by membrane treatment appts; (7) with above-mentioned fresh water, carry out desalination by a deep desalting device and make pure water by obtaining after the membrane treatment appts processing.But obtained pure water direct reuse polymerization process, the dense water of gained can be used for polymeric kettle in advance towards still or as the calcium carbide dissolving water of generated by polyvinyl chloride by calcium carbide factory.
Make eye bright for reaching above-mentioned first, to the invention provides another kind can handle to obtain being back to the PVC centrifuge mother liquor treatment process of the different operations of Production of PVC producer polyvinyl chloride centrifugation mother liquid.This technology may further comprise the steps: make fresh water through above-mentioned (1), (2), (3), (4), (5), (6), fresh water water quality can reach the salt content index of one-level demineralized water, can be used for polymerization process, but also has risk.This be since the characteristic of film device determined its fresh water water quality that makes with the variation of film device influent quality instability, and COD content is higher, also with film device the intake variation of COD and instability.Fresh water can be directly as the mixed bed feedwater of demineralizer, the dense water of gained can be used for polymeric kettle in advance towards still or as the calcium carbide dissolving water of generated by polyvinyl chloride by calcium carbide factory.
For reaching the purpose of above-mentioned first invention, the invention provides another kind can handle to obtain being back to the PVC centrifuge mother liquor treatment process of the different operations of Production of PVC producer the polyvinylchloride centrifugal mother liquor waste water.This technology may further comprise the steps: through above-mentioned (1), (2), (3), (4), (5) obtained cleaner liquid of crossing, can be used for polymeric kettle in advance towards still or as the calcium carbide dissolving water of generated by polyvinyl chloride by calcium carbide factory.
Preferably: described cooling adopts the method for spraying cooling pond, air cooling tower or cooling water heat exchanger or its combination to carry out.If when the PVC centrifuge mother liquor water temperature of discharging is lower than 35 ℃, can not select heat sink for use;
Described PVC centrifuge mother liquor adopts pipe-line mixer, water sprayer, mechanical agitation mixing channel or spiral-flow type mixing pit to carry out with mixing of dedicated processes medicament (flocculant);
Described coagulation clarification adopt coagulator and settling vessel be connected combination or coagulating sedimentation (coagulation clarification) integrated device carries out;
Described air-dissolving air-float adopts air-dissolving apparatus and air-floating apparatus to carry out.The molten gas method of air-dissolving apparatus adopts the molten gas of full flow, the molten gas of partial discharge or the molten gas of partial reflux to carry out;
Loose media filtration device, secondary filter device, precoat filtration device are adopted in described filtration;
What described film was handled employing is that the reverse osmosis unit of pollution-resistant membrane or the combination of ultrafiltration membrane treatment device and pollution-resistant membrane reverse osmosis unit are carried out;
What described deep desalting device adopted is that mixed-bed ion exchanger or the electric demineralizer (EDI) that highly acidic resin and basic resin constitute carries out.
For realizing above-mentioned second goal of the invention, the invention provides a kind of PVC centrifugal mother liquor treatment reclaiming equipment of realizing above-mentioned technology, this equipment comprises heat sink, be arranged on the mixing apparatus that PVC centrifuge mother liquor and dedicated processes medicament (flocculant) after the described heat sink mix mutually, be arranged on described mixing apparatus coagulation clarification device afterwards, be arranged on described coagulation clarification device dissolved air flotation device afterwards, be arranged on described dissolved air flotation device filter afterwards, be arranged on described filter membrane treatment appts afterwards, be arranged on described membrane treatment appts deep desalting device afterwards.
Preferably: described heat sink adopts the mode of spraying cooling pond, air cooling tower or cooling water heat exchanger or its combination.If when the PVC centrifuge mother liquor water temperature of discharging is lower than 35 ℃, can not select heat sink for use;
The mixing arrangement of described PVC centrifuge mother liquor and dedicated processes medicament (flocculant) adopts pipe-line mixer, water sprayer, mechanical agitation mixing channel or spiral-flow type mixing pit;
What described coagulation clarification device adopted coagulator and settling vessel is connected combination or coagulating sedimentation (coagulation clarification) integrated device, as the coagulating sedimentation device;
Described dissolved air flotation device comprises air-dissolving apparatus and air-floating apparatus, and air-dissolving apparatus adopts dissolving pressure air-dissolving, the molten gas of container pump or the molten gas of water sprayer; Air-floating apparatus adopts flat flow flotation tank, vertical-flow air flotation pond, eddy current reaction flotation tank, cellular type to react flotation tank, combine flotation tank with tube settler or combine flotation tank with sedimentation basin.The molten gas mode of air-dissolving apparatus: adopt the molten gas of full flow, the molten gas of partial discharge or the molten gas of partial reflux;
Described filter adopts loose filtering material filter, accurate filter, precoat filter;
What described membrane treatment appts adopted is the combination of reverse osmosis unit or the ultrafiltration membrane treatment device and the pollution-resistant membrane reverse osmosis unit of pollution-resistant membrane;
What described deep desalting device adopted is mixed-bed ion exchanger or the electric demineralizer (EDI) that highly acidic resin and basic resin constitute.
Because the present invention adopts above-mentioned technology and equipment to remove to handle the PVC centrifuge mother liquor, make the PVC centrifuge mother liquor water quality after the processing reach the water standard that is directly used in polymerization process, realize the processing reuse of PVC centrifuge mother liquor.This technology has been owing to strengthened the technology of pretreatment stage, makes the PVC centrifuge mother liquor contain the water-solubility PVA colloid and small suspended material is able to good removal, thus the influent quality guaranteed film the processing stage.
Compared with prior art, the present invention has following characteristics:
A, compare with the bioanalysis treatment process:
1, significantly reduced floor space;
2, the pretreating process of physical-chemical process has shortened the start-stop car time of installing greatly;
3, need not a large amount of compressed air;
4, saved sterilizing unit;
5, device is reliable, convenient operation and management, small investment.
B, compare with two membrane treatment process:
1, adopt enhanced coagulation clarification, air-dissolving air-float and mechanical filter combination pretreating process, remove most suspensions and most COD in the former water, especially removed the PVC centrifuge mother liquor and contained water-solubility PVA, thus the influent quality guaranteed film the processing stage;
2, because the PVC centrifuge mother liquor contains the removal of water-solubility PVA, significantly reduced adhesion and the membrane channels of PVA colloid and stopped up on the film surface, guaranteed the water-flowing amount of film;
3, reduce the cleaning frequency of film simultaneously, prolonged the service life of film greatly, reduced the possibility that film damages, guaranteed the stable of effluent quality;
4, reduced device and safeguarded, reduced operating cost, increased the mixed bed ion exchange technique simultaneously, made final outflow water reach the polymerization reuse.
Description of drawings
Fig. 1 is the process chart of first embodiment of PVC centrifugal mother liquor treatment reclaiming technique of the present invention;
Fig. 2 is the process chart of second embodiment of PVC centrifugal mother liquor treatment reclaiming technique of the present invention;
Fig. 3 is the process chart of the 3rd embodiment of PVC centrifugal mother liquor treatment reclaiming technique of the present invention;
Fig. 4 is the schematic diagram of an embodiment of PVC centrifugal mother liquor treatment reclaiming equipment of the present invention.
The specific embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
Referring to Fig. 1, shown in Figure 1 is of the present invention a kind of the polyvinylchloride centrifugal mother liquor waste water is handled, with the process chart of first embodiment of the PVC centrifugal mother liquor waste water treatment process that obtains being back to the different operations of Production of PVC producer.
But the obtained pure water direct reuse of the PVC centrifugal mother liquor waste water polymerization process after this flow processing, the dense water of the counter-infiltration of gained (RO) can be used for polymeric kettle in advance towards still or as the calcium carbide dissolving water of generated by polyvinyl chloride by calcium carbide factory.This technological process may further comprise the steps: 65 ℃ of PVC centrifugal mother liquor waste water turbidity 32NTU, SS 11mg/l, COD109mg/l, electrical conductivity 262us/cm, PH 10.0, the temperature of the discharging of (1) Polyvinyl Chloride System, it is transported to heat sink-air cooling tower lowers the temperature, temperature is reduced to below 40 ℃, enter a buffering sedimentation basin and cushion precipitation.(2) the PVC centrifuge mother liquor after will lowering the temperature is transported to a blender and is fully mixed with the PVC centrifuge mother liquor dedicated processes medicament (flocculant) of adding, make the PVC centrifuge mother liquor that is added with PVC centrifuge mother liquor dedicated processes medicament (flocculant) enter the coagulation clarification device and carry out coagulation clarification, sediment is drained by the bottom of clarifier floss hole, and one time clear liquid enters storage tank 21 by clarifier top overfall.(3) dissolving is transported in a clear liquid pressurization that the dosing coagulation clarification is obtained, and feeds compressed air simultaneously, make compressed air be dissolved in clear liquid under pressure one time, and the dissolving that reaches under this temperature and pressure is saturated, forms dissolved air water.Dissolved air water enters in the air flotation slot and discharges by the release explosive decompression, make the rapid benefit of the air that dissolves in the dissolved air water, and the formation tiny bubble floats from water, bubble carries tiny suspension and PVA together floats at floating-upward process, form the stickiness scum silica frost, strike off scum silica frost with Slag Scraping Device, the secondary clear liquid that obtains enters storage tank 22 by the air flotation slot purified liquor outlet.(4) above-mentioned secondary clear liquid is transported to a filter and filters, obtained cleaner liquid, after testing this moment gained cross cleaner liquid COD 30.8mg/l, electrical conductivity 326us/cm, PH 7.7.(5) will cross cleaner liquid transports to a membrane treatment appts (being made of ultrafiltration UF+ reverse osmosis (RO)) and carries out film and handle, obtain fresh water after handling by membrane treatment appts, after testing this moment gained fresh water COD3.8mg/l, electrical conductivity 3.8us/cm, PH 6.8, TOC 2.1mg/l, Cl-0.85mg/l.(6) fresh water that obtains after membrane treatment appts is handled is transported to deep desalting device-mixed-bed ion exchanger and is carried out advanced desalination and make pure water, after testing this moment gained pure water COD0.6mg/l, electrical conductivity 0.362us/cm, TOC0.5mg/l, PH 7.5, Cl-0.34mg/l.But reach the water standard of direct reuse polymerization process, the dense water of gained can be used for polymeric kettle in advance towards still or as the calcium carbide dissolving water of generated by polyvinyl chloride by calcium carbide factory.
Referring to Fig. 2, shown in Figure 2 is that another kind of the present invention is handled the polyvinylchloride centrifugal mother liquor waste water, with the process chart of second embodiment of the PVC centrifugal mother liquor waste water treatment process that obtains being back to the different operations of Production of PVC producer.
The obtained fresh water water quality of PVC centrifugal mother liquor waste water after this flow processing can reach the salt content index of one-level demineralized water.This technological process may further comprise the steps: 65 ℃ of PVC centrifugal mother liquor waste water turbidity 32NTU, SS 11mg/l, COD109mg/l, electrical conductivity 262us/cm, PH 10.0, the temperature of the discharging of (1) Polyvinyl Chloride System, it is transported to heat sink-air cooling tower lowers the temperature, temperature is reduced to below 40 ℃, enter a buffering sedimentation basin and cushion precipitation.(2) the PVC centrifuge mother liquor after will lowering the temperature is transported to a mixing arrangement and is fully mixed with the PVC centrifuge mother liquor dedicated processes medicament (flocculant) of adding, make the PVC centrifuge mother liquor that is added with PVC centrifuge mother liquor dedicated processes medicament (flocculant) enter the coagulation clarification device and carry out coagulation clarification, sediment is drained by the bottom of clarifier floss hole, and one time clear liquid enters storage tank 21 by clarifier top overfall.(3) dissolving is transported in a clear liquid pressurization that the dosing coagulation clarification is obtained, and feeds compressed air simultaneously, make compressed air be dissolved in clear liquid under pressure one time, and the dissolving that reaches under this temperature and pressure is saturated, forms dissolved air water.Dissolved air water enters in the air flotation slot and discharges by the release explosive decompression, make the rapid benefit of the air that dissolves in the dissolved air water, and the formation tiny bubble floats from water, bubble carries tiny suspension and PVA together floats at floating-upward process, form the stickiness scum silica frost, strike off scum silica frost with Slag Scraping Device, the secondary clear liquid that obtains enters storage tank 22 by the air flotation slot purified liquor outlet.(4) above-mentioned secondary clear liquid is transported to a filter and filters, obtained cleaner liquid, after testing this moment gained cross cleaner liquid COD30.8mg/l, electrical conductivity 326us/cm, PH 7.7.(5) will cross cleaner liquid transports to a membrane treatment appts (have ultrafiltration UF+ reverse osmosis (RO) constitute) and carries out film and handle, the fresh water that obtains after handling by membrane treatment appts, after testing this moment gained cross cleaner liquid COD 3.8mg/l, electrical conductivity 3.8us/cm, PH 6.8, TOC 2.1mg/l, Cl-0.85mg/l.Water quality reaches the salt content index of one-level demineralized water.Can be used for polymerization process, but also have risk.This be since the characteristic of film device determined its fresh water water quality that makes with the variation of film device influent quality instability, and COD content is higher, also with film device the intake variation of COD and instability.Fresh water can be directly as the mixed bed feedwater of demineralized water device, the dense water of the counter-infiltration of gained (RO) can be used for polymeric kettle in advance towards still or as the calcium carbide dissolving water of generated by polyvinyl chloride by calcium carbide factory.
Referring to Fig. 3, shown in Figure 3 is that another kind of the present invention is handled the polyvinylchloride centrifugal mother liquor waste water, with the process chart of the 3rd embodiment of the PVC centrifugal mother liquor waste water treatment process that obtains being back to the different operations of Production of PVC producer.
The prepared cleaner liquid of crossing of PVC centrifugal mother liquor waste water after this flow processing, turbidity is less than 2NTU.This technological process may further comprise the steps: 65 ℃ of PVC centrifugal mother liquor waste water turbidity 32NTU, SS 11mg/l, COD109mg/l, electrical conductivity 262us/cm, PH 10.0, the temperature of the discharging of (1) Polyvinyl Chloride System, it is transported to heat sink-air cooling tower lowers the temperature, temperature is reduced to below 40 ℃, enter a buffering sedimentation basin and cushion precipitation.(2) the PVC centrifuge mother liquor after will lowering the temperature is transported to a blender and is fully mixed with the PVC centrifuge mother liquor dedicated processes medicament (flocculant) of adding, make the PVC centrifuge mother liquor that is added with PVC centrifuge mother liquor dedicated processes medicament (flocculant) enter the coagulation clarification device and carry out coagulation clarification, sediment is drained by the bottom of clarifier floss hole, and one time clear liquid enters storage tank 21 by clarifier top overfall.(3) air-dissolving apparatus is transported in a clear liquid pressurization that the dosing coagulation clarification is obtained, and feeds compressed air simultaneously, make compressed air be dissolved in clear liquid under pressure one time, and the dissolving that reaches under this temperature and pressure is saturated, forms dissolved air water.Dissolved air water enters in the air flotation slot and discharges by the release explosive decompression, make the rapid benefit of the air that dissolves in the dissolved air water, and the formation tiny bubble floats from water, bubble carries tiny suspension and PVA together floats at floating-upward process, form the stickiness scum silica frost, strike off scum silica frost with Slag Scraping Device, the secondary clear liquid that obtains enters storage tank 22 by the air flotation slot purified liquor outlet.(4) above-mentioned secondary clear liquid is transported to a filter and filters, obtained cleaner liquid, after testing this moment gained cross cleaner liquid, turbidity is less than 2NTU, can be used for polymeric kettle in advance towards still or as the calcium carbide dissolving water of generated by polyvinyl chloride by calcium carbide factory.
Referring to Fig. 4, shown in Figure 4 is of the present invention a kind of the PVC centrifugal mother liquor waste water is handled, with the schematic diagram of an embodiment of the PVC centrifugal mother liquor waste water treatment facility that obtains being back to the different operations of Production of PVC producer.Described equipment comprises heat sink, the dosing mixing arrangement, the coagulation clarification device, dissolved air flotation device, filter, membrane treatment appts and deep desalting device, wherein the heat sink in the present embodiment is an air cooling compressor 1, the dosing mixing arrangement is a pipe-line mixer 3, clarification is the clarifier 4 of one to the coagulation clarification device with precipitation for the collection enhanced coagulation, dissolved air flotation device is a dissolving 6 and one gas and water separator-air flotation slot 7, filter is the filter 9 of a loose filtrate, membrane treatment appts is the assembly 10 of a ultrafiltration membrane treatment device and pollution-resistant membrane reverse osmosis unit, and the deep desalting device is a mixed-bed ion exchanger that has highly acidic resin and basic resin to constitute.
Described heat sink cooling tower 1 is provided with PVC centrifuge mother liquor water inlet 101, delivery port 125;
Described blender 3 is provided with water inlet 103, delivery port 104 and dosing mouth 124;
Described clarification gas scientific research task device 4 is provided with water inlet 105, delivery port 106 and sediment discharge mouth 122;
The dissolving 6 of described dissolved air flotation device is provided with water inlet 109, dissolved air water outlet 111 and compressed air inlet port 110, and gas and water separator-air flotation slot 7 is provided with dissolved air water import 112, delivery port 113;
Described filter 9 is provided with water inlet 116, delivery port 117;
Described membrane treatment appts 10 is provided with water inlet 118, water outlet 119 and dense water out 123;
Described deep desalting device-mixed-bed ion exchanger 11 is provided with water inlet 120, delivery port 121.
The PVC centrifuge mother liquor comes water pipeline to be connected with described heat sink cooling tower 1 import 101, and water outlet directly enters precipitation buffering pond 2; The delivery port 102 in precipitation buffering pond 2 is connected with described blender 3 water inlets 103 with delivery pump by pipeline, and blender 3 dosing mouths 124 connect the dosing pipeline; Blender 3 delivery ports 104 are connected with described coagulation clarification device 4 water inlets 105 by pipeline, the coagulation clarification device 4 sediment discharge mouths 122 dirty pipeline that runs in; The delivery port 106 of described coagulation clarification device 4 is connected with storage tank 21 water inlets 107 by pipeline; Storage tank 21 delivery ports 108 are connected with dissolving 6 water inlets 109 of described dissolved air flotation device with delivery pump by pipeline, dissolving 6 air inlets 110 connect compressed-air line, dissolving 6 delivery ports 111 are connected with gas and water separator-air flotation slot 7 dissolved air water imports 112 of described dissolved air flotation device by pipeline, and air flotation slot 7 delivery ports 113 are connected with storage tank 22 water inlets 114 by pipeline; Storage tank 21 delivery ports 115 are connected with described filter 9 water inlets 116 with delivery pump by pipeline, and delivery port 117 is connected with described membrane treatment appts 10 water inlets 118 by pipeline, and membrane treatment appts 10 concentrated water spouts 123 connect the concentrated water discharge pipeline; Described membrane treatment appts 10 delivery ports 119 are connected with described deep desalting device-mixed-bed ion exchanger 11 water inlets 120 by pipeline, and mixed-bed ion exchanger 11 delivery ports 121 connect plain water lines.
The main component of the centrifuge mother liquor dedicated processes medicament described in PVC centrifugal mother liquor treatment reclaiming technique of the present invention and the equipment is aluminum sulfate, aluminium polychloride, bodied ferric sulfate, potassium ferrate, potassium permanganate, chitin or the like.
Claims (9)
1. PVC centrifugal mother liquor treatment reclaiming technique, it is characterized in that, this technology may further comprise the steps: when (1) is higher than 35 ℃ in the PVC centrifuge mother liquor water temperature of Production of PVC device discharging, at first described PVC centrifuge mother liquor is transported to a heat sink and lower the temperature, obtain the PVC centrifuge mother liquor of 20-35 ℃ of water temperature; (2) the PVC centrifuge mother liquor after the described cooling is transported to a mixing arrangement and fully mixed, obtain being added with the PVC centrifuge mother liquor of PVC centrifuge mother liquor flocculant with the PVC centrifuge mother liquor flocculant of adding; (3) the PVC centrifuge mother liquor of the above-mentioned PVC of being added with centrifuge mother liquor flocculant being transported to the coagulation clarification device carries out coagulation clarification and obtains clear liquid one time; (4) an above-mentioned clear liquid is transported to a dissolved air flotation device and carry out the air supporting flotation, propose PVA impurity, obtain the secondary clear liquid; (5) above-mentioned secondary clear liquid is transported to a filter and filters, obtain cross cleaner liquid can be used for polymeric kettle in advance towards still or as the calcium carbide dissolving water of generated by polyvinyl chloride by calcium carbide; (6) above-mentioned cleaner liquid is excessively transported to a membrane treatment appts and carry out the film processing, by the fresh water that obtains after the membrane treatment appts processing, can be directly as the mixed bed feedwater of demineralized water device, the dense water of gained can be used for polymeric kettle in advance towards still or as the calcium carbide dissolving water of generated by polyvinyl chloride by calcium carbide factory.
2. technology according to claim 1, it is characterized in that, described technology also comprises step: (7) are with above-mentioned fresh water by obtaining after the membrane treatment appts processing, carry out desalination by a deep desalting device and make pure water, but obtained pure water direct reuse polymerization process, the dense water of gained can be used for polymeric kettle in advance towards still or as the calcium carbide dissolving water of generated by polyvinyl chloride by calcium carbide factory.
3. technology according to claim 1 and 2 is characterized in that, described cooling adopts the method for spraying cooling pond, air cooling tower or cooling water heat exchanger or its combination to carry out.
4. technology according to claim 1 and 2 is characterized in that, described PVC centrifuge mother liquor adopts pipe-line mixer, water sprayer, mechanical agitation mixing channel or spiral-flow type mixing pit to carry out with mixing of flocculant.
5. equipment of realizing PVC centrifugal mother liquor treatment reclaiming technique as claimed in claim 2, it is characterized in that this equipment comprises heat sink, be arranged on the mixing arrangement that PVC centrifuge mother liquor and flocculant after the described heat sink mix mutually, be arranged on described mixing arrangement coagulation clarification device afterwards, be arranged on described coagulation clarification device dissolved air flotation device afterwards, be arranged on described dissolved air flotation device filter afterwards, be arranged on described filter membrane treatment appts afterwards, be arranged on described membrane treatment appts deep desalting device afterwards.
6. equipment according to claim 5 is characterized in that described heat sink is made of the mode of spraying cooling pond, air cooling tower or cooling water heat exchanger or its combination.
7. equipment according to claim 5 is characterized in that, described PVC centrifuge mother liquor is made of pipe-line mixer, water sprayer, mechanical agitation mixing channel or spiral-flow type mixing pit with the mixing arrangement that flocculant mixes mutually.
8. equipment according to claim 5 is characterized in that, described coagulation clarification device by coagulator and settling vessel be connected combination or the coagulation integrated device constitutes.
9. equipment according to claim 5 is characterized in that described dissolved air flotation device comprises air-dissolving apparatus and air-floating apparatus, and air-dissolving apparatus adopts dissolving pressure air-dissolving, the molten gas of container pump or the molten gas of water sprayer; Air-floating apparatus adopts flat flow flotation tank, vertical-flow air flotation pond, eddy current reaction flotation tank, cellular type to react flotation tank, combine flotation tank with tube settler or combine flotation tank with sedimentation basin.
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| CN2007101195948A CN101148275B (en) | 2007-07-26 | 2007-07-26 | PVC centrifugal mother liquor treatment reclaiming technique and device |
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| CN2007101195948A CN101148275B (en) | 2007-07-26 | 2007-07-26 | PVC centrifugal mother liquor treatment reclaiming technique and device |
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| CN101148275B true CN101148275B (en) | 2010-09-22 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101250017B (en) * | 2008-04-02 | 2010-05-12 | 总装备部工程设计研究总院 | Purification technique for methyl stannum mercaptide industrial sewage |
| CN101948196B (en) * | 2010-09-16 | 2013-04-10 | 江苏新龙鼎环保成套工程有限公司 | Cross flow air floating device with secondary filtration |
| CN101974165B (en) * | 2010-09-30 | 2012-03-21 | 南京工业大学 | Method for recovering PVA in waste water generated by water jet abrasive material |
| CN101955281B (en) * | 2010-09-30 | 2012-07-11 | 南京工业大学 | Method for processing waste water generated by water jet abrasives |
| CN102923888B (en) * | 2011-08-08 | 2016-01-13 | 凯膜过滤技术(上海)有限公司 | A kind of method of electrochemical treatment PVC centrifugation mother liquor |
| CN102372389A (en) * | 2011-10-14 | 2012-03-14 | 广州新普利水处理科技有限公司 | PVC (polyvinyl chloride) centrifugal mother liquor wastewater recycling process utilizing tubular membrane filter |
| CN102732645B (en) * | 2012-07-24 | 2013-12-11 | 广西大学 | High-speed floatation device |
| CN102887577A (en) * | 2012-09-25 | 2013-01-23 | 江苏红旗印染机械有限公司 | System for recycling PVA (Polyvinyl Alcohol) slurry from printing and dyeing wastewater and desizing wastewater |
| CN102964024B (en) * | 2012-09-29 | 2014-02-26 | 河南永银化工实业有限公司 | Wastewater zero discharge system of chlorine-alkali industry |
| CN103274569B (en) * | 2013-06-05 | 2014-06-11 | 内蒙古乌海化工股份有限公司 | Novel polyvinyl chloride (PVC) mother solution treatment equipment and method |
| CN105036463A (en) * | 2015-07-04 | 2015-11-11 | 吉林大学 | Polyvinyl chloride centrifugal mother liquor wastewater pretreatment method |
| CN111392913A (en) * | 2020-04-24 | 2020-07-10 | 莱特莱德（北京）环境技术股份有限公司 | System and method for advanced treatment of PVC centrifugal mother liquor waste liquid |
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